In special and general relativity, a light cone (or "null cone") is the path that a flash of light, emanating from a single event (localized to a single...
10 KB (1,544 words) - 19:45, 21 June 2024
Closed timelike curve (section Light cones)
more specifically Minkowski space, physicists often refer to a "light cone". A light cone represents any possible future evolution of an object given its...
14 KB (1,924 words) - 06:15, 5 July 2024
The cone of light, or light reflex, is a visible phenomenon which occurs upon examination of the tympanic membrane with an otoscope. Shining light on the...
2 KB (215 words) - 05:08, 4 February 2024
In physics, particularly special relativity, light-cone coordinates, introduced by Paul Dirac and also known as Dirac coordinates, are a special coordinate...
7 KB (1,362 words) - 04:31, 28 January 2024
Cone cells or cones are photoreceptor cells in the retinas of vertebrates' eyes. They respond differently to light of different wavelengths, and the combination...
16 KB (1,938 words) - 15:11, 29 April 2024
Spacetime (redirect from Light-like)
past light cone. So in timelike intervals Δct is greater than Δx, making timelike intervals positive.: 220 The region exterior to the light cone consists...
173 KB (24,123 words) - 14:04, 18 July 2024
String field theory (redirect from Light-cone string field theory)
resulting string field theories can be very different. Using light cone gauge, yields light-cone string field theories whereas using BRST quantization, one...
36 KB (5,311 words) - 04:19, 7 November 2023
light cones from these events intersect the particle's world line. On the other hand, if the particle is accelerating, in some situations light cones...
28 KB (3,545 words) - 16:46, 8 July 2024
Gödel metric (section Appearance of the light cones)
of the light cones changes as we travel out from the axis of symmetry r = 0 {\displaystyle r=0} : When we get to the critical radius, the cones become...
25 KB (3,808 words) - 11:47, 2 July 2024
The speed of light in vacuum, commonly denoted c, is a universal physical constant that is exactly equal to 299,792,458 metres per second (approximately...
145 KB (15,359 words) - 18:03, 8 August 2024
this principle is the light cone, which is constructed as follows. Taking as event p {\displaystyle p} a flash of light (light pulse) at time t 0 {\displaystyle...
3 KB (384 words) - 15:33, 15 June 2024
special relativity, the future is considered absolute future, or the future light cone. In the philosophy of time, presentism is the belief that only the present...
29 KB (3,647 words) - 14:12, 17 August 2024
In theoretical physics, light cone gauge is an approach to remove the ambiguities arising from a gauge symmetry. While the term refers to several situations...
2 KB (268 words) - 18:38, 17 July 2022
time, manifested in waves (e.g. light and sound) travelling only expanding (rather than focusing) in time (see light cone); Entropic arrow of time: according...
111 KB (13,157 words) - 02:49, 12 August 2024
spacetime. In this space, there is a defined light-cone associated with each point, and events not on the light cone are classified by their relation to the...
80 KB (10,620 words) - 15:00, 20 August 2024
dimension. The units of measurement in these diagrams are taken such that the light cone at an event consists of the lines of slope plus or minus one through that...
47 KB (6,004 words) - 20:47, 6 June 2024
paths, or more accurately the future light cone containing all possible world lines (in this diagram the light cone is represented by the V-shaped region...
164 KB (18,504 words) - 16:11, 15 August 2024
emits only light that arrives nearly perpendicular to the semiconductor's surface, in a cone shape referred to as the light cone, cone of light, or the escape...
32 KB (3,358 words) - 14:38, 21 July 2024
light cone of the event and ultimately reducible to fundamental interactions. Similarly, a cause cannot have an effect outside its future light cone....
15 KB (2,138 words) - 17:23, 17 August 2024
another type): light-like curves, having at each point the speed of light. They form a cone in spacetime, dividing it into two parts. The cone is three-dimensional...
25 KB (3,525 words) - 23:13, 1 June 2024
light cone of x {\displaystyle x} as the future and past null cones of x {\displaystyle x} together. elsewhere as points not in the light cone, causal...
22 KB (3,430 words) - 05:00, 7 April 2024
Photoreceptor cell (redirect from Rods and cones)
420 nm than at any other wavelength. Light of a longer wavelength can also produce the same response from an S-cone, but it would have to be brighter to...
26 KB (2,937 words) - 05:37, 25 July 2024
Achromatopsia (section Blue cone monochromacy)
concentration changes of cGMP due to light input into the retina.[citation needed] Upon activation by light, cone opsin causes the exchange of GDP for...
29 KB (3,213 words) - 11:21, 21 August 2024
large quantum systems, including nuclei. For example, in the discretized light-cone quantization method (DLCQ), periodic conditions are introduced such that...
74 KB (11,024 words) - 07:17, 11 December 2023
a given observer "now" takes the form of the observer's past light cone. The light cone of a given event is objectively defined as the collection of events...
12 KB (1,373 words) - 03:40, 29 July 2024
field theory. An explicit description of the second-quantization of the light-cone string was given by Kaku and Keiji Kikkawa. Kaku is most widely known...
30 KB (2,981 words) - 08:01, 18 August 2024
of light, and with high-energy phenomena. With Lorentz symmetry, additional structures come into play. They are defined by the set of light cones (see...
193 KB (22,618 words) - 09:35, 20 August 2024
we live within their past light cone. But we cannot receive signals from those parties and places outside our past light cone. Along with the formulation...
44 KB (6,117 words) - 14:38, 2 August 2024
Volumetric lighting (redirect from Volumetric light)
lighting, the light cone emitted by a light source is modeled as a transparent object and considered as a container of a "volume". As a result, light has the...
3 KB (388 words) - 05:41, 21 February 2023
types of higher-intensity light receptors (called cone cells in vertebrates as opposed to rod cells, which are lower-intensity light receptors) with different...
25 KB (2,713 words) - 05:24, 20 August 2024